Common Base Amplifiers (15-Transistors)

Derivation of the gain from the small-signal model. Let's then derive the gain using inspection and impedance reflection. What is the gain of a common base amplifier? Why would you want to use it? Why is the gain non-inverting?
Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore.
danner.group
Video filmed and edited with help of CIT, NUS.

[@albertorobinson7611]

thanks

[@paulpaulzadeh6172]

Hi Prof.
One question, which one has better linearity , C.B. or C.E.
Can you make video about Cascode version too.

[@abraheom]

Thanks!!! ❤

[@paulpaulzadeh6172]

This is another evidence that transistor is controlled by voltage . When Vbe decrease then Ic decrease.
The BIG question: Is transistor current controlled or voltage controlled. In your analysis you used current controlled.
BUT C.B. show it otherwise.
This is very tricky question :
Which one happens first.
Vbe or Ic or Ib? Right answer is :
First Vbe should be there , then after that Ic flow. AND because of Ic , Ib will comes in
So the true equation is : Ib = Ic/B and not Ic = Bx Ic .
Ic must comes first then Ib not opposite.